Delta Electronics DVP15MC11T User Manual

Chapter 8 Logic Instructions
8_
Note:
The symbol ● indicates that the parameter is allowed to connect to the variable or constant of the data type.
 Function Explanation
CTUD is used as an up counter for counting up and a down counter for counting down.
 Precautions for Correct Use

The counter will not count down while Load is TRUE.

The counter will not count up while Reset is TRUE.

Programming Example

The variable table and program
Variable name
Data type
Initial value
CTUD1 CTUD
CTUD1_EN
BOOL
FALSE
CTUD1_CU
BOOL
FALSE
CTUD1_CD
BOOL
FALSE
CTUD1_Reset
BOOL
FALSE
CTUD1_Load
BOOL
FALSE
CTUD1_PV
UDINT
4
CTUD1_QU
BOOL
CTUD1_QD
BOOL
CTUD1_CV
UDINT

Timing Chart:
Case 1： If CTUD counts up normally, the value of CTUD1_CV is increased by 1 whenever
CTUD1_CU is triggered once.
Case 2： When CTUD1_Reset is TRUE, CTUD1_CV is cleared to 0, CTUD1_QU changes to
FALSE and CTUD1_QD changes to TRUE.
1
CTUD
EN ENO
QU
CTUD1
CU
CD
QD
Reset
Load
PV
CV
CTUD1_EN
CTUD1_CU
CTUD1_CD
CTUD1_Reset
CTUD1_Load
CTUD1_PV
CTUD1_QU
CTUD1_QD
CTUD1_CV
CTUD1_CU
CTUD1_CD
CTUD1_CV
CTUD1_QU
CTUD1_PV
CTUD1_Reset
CTUD1_Load
CTUD1_QD
Case 1 Case 2
Case 3 Case 4
8-51

Delta Electronics DVP15MC11T Specifications

General

Brand	Delta Electronics
Model	DVP15MC11T
Category	Controller
Language	English